Viessmann FS2B, Installation And Service Instructions Manual

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Display Explanation
Start valve Heating Diverter valve set to heating mode
Start valve centre Diverter valve in central position (filling/draining)
Start valve cylinder Diverter valve set to DHW mode
Start htg circ pump HC2 Heating circuit pump output enabled (extension to heat-
ing circuit with mixer)
Open mixer HC2 "Mixer open" output enabled (extension to heating circuit
with mixer)
Close mixer HC2 "Mixer closed" output enabled (extension to heating cir-
cuit with mixer)
Start htg circ pump HC3 Heating circuit pump output enabled (extension to heat-
ing circuit with mixer)
Open mixer HC3 "Mixer open" output enabled (extension to heating circuit
with mixer)
Close mixer HC3 "Mixer closed" output enabled (extension to heating cir-
cuit with mixer)
Start outp. int. exten. H1 Output at internal extension enabled
Start AM1 output 1 Output A1 at extension AM1 enabled
Start AM1 output 2 Output A2 at extension AM1 enabled
Start EA1 output 1
Contacts P - S at plug
aBJ
for extension EA1 closed
Constant temperature control unit
1. Press OK and
å
simultaneously
for approx. 4 s.
"
Ü
" flashes on the display.
2. Select
Ú
" " and confirm with OK .
3. Select required actuator (output) with
V
/
v
(see following table):
4. Confirm selected actuator with OK .
The display shows the number for the
activated actuator and "
ON ".
The following actuators (relay outputs) can be controlled subject to system
design:
Display
Explanation
1 Burner operates at minimum output; internal pump starts
2 Burner operates at maximum output; internal pump starts
3 Internal output sÖ (internal pump) is enabled
4 Diverter valve set to heating mode
5 Diverter valve in central position (filling/draining)
6 Diverter valve set to DHW mode
10 Internal extension output enabled
Diagnosis and service scans
Checking outputs (relay test)
(cont.)
5457 552 GB